ASN Wikibase Occurrence # 137366
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| Date: | Monday 11 July 2011 |
| Time: | 10:19 LT |
| Type: |  Sikorsky S-76C++ |
| Owner/operator: | Héli-Union |
| Registration: | F-HJCS |
| MSN: | 760740 |
| Year of manufacture: | 2008 |
| Fatalities: | Fatalities: 3 / Occupants: 11 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Andaman Sea, off Myanmar coast -
 Myanmar
|
| Phase: | Take off |
| Nature: | Offshore |
| Departure airport: | FPSO, Yetagun field, Andaman Sea |
| Kanbauk Airfield | |
| Investigating agency: | BEA |
| Confidence Rating: |  Accident investigation report completed and information captured |
An S-76C++ crashed into the Andaman Sea sea off Myanmar when taking off from the Yetagun oil field, killing three people on board (the co-pilot and 2 pax downed). Eight were rescued after a delay initiating the FPSO ERP.
At 25 feet above the platform, during a PC2(Exposure) take off the pilot initiated a cyclic input, but one engine lost power and the aircraft was ditched.
Findings
The helicopter was certified, equipped and maintained in accordance with existing regulations and approved procedures.
The flight crew were properly licensed and qualified to conduct the flight.
Héli-Union holds a valid AOC.
The operations manual describes procedures in case of engine shutdown.
One engine flame out.
The pilot made an emergency landing (ditching).
The helicopter capsized after contact with the water.
All crew members and passengers evacuated.
All crew members and passengers boarded a life boat after 30 minutes.
Two passengers and the co-pilot drowned.
The wreckage was recovered on 26 November, 138 days after the accident.
Both engines were examined on 15 and 16 December.
The examination performed on the two engines determined an engine #2 in-flight shutdown.
The in-flight shutdown was due to a failed HP turbine blade.
The blade failure phenomenon had been identified in 2007.
Corrective action was current through the TU166 modification. This modification was mandated by EASA on single-engine applications, and monitored by EASA on twin-engine applications.
The F-HJCS helicopter had not been retrofitted.
Causes
The accident originated from engine n°2 failure.
The take-off procedure in performance class 2 with exposure time (in all take-off/ landing conditions ) does not guarantee a safe emerge forced landing.
Accident investigation:
 |
|
Sources:
http://www.bea.aero/docspa/2011/f-cs110711/pdf/f-cs110711.pdf
http://www.chinadaily.com.cn/xinhua/2011-07-12/content_3161579.html
https://finance.yahoo.com/news/Helicopter-crashes-in-sea-off-apf-90313002.html?x=0&.v=1&utm_source=twitterfeed&utm_medium=twitter
https://blogs.voanews.com/breaking-news/2011/07/11/helicopter-crash-kills-3-in-burma-2/
http://www.irrawaddy.com/article.php?art_id=21670
Myanmar DCA
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Jul-2011 10:45 | gerard57 | Added |
| 11-Jul-2011 11:13 | gerard57 | Updated [Operator, Location, Source] |
| 11-Jul-2011 15:00 | RobertMB | Updated [Time, Aircraft type, Operator, Other fatalities, Phase, Source, Narrative] |
| 12-Jul-2011 12:11 | Anon. | Updated [Narrative] |
| 12-Jul-2011 12:44 | TB | Updated [Aircraft type, Operator, Location, Source, Narrative] |
| 12-Jul-2011 19:45 | RobertMB | Updated [Aircraft type, Operator, Location, Narrative] |
| 15-Jul-2011 12:43 | TB | Updated [Aircraft type, Registration, Cn, Location] |
| 15-Jul-2011 16:43 | RobertMB | Updated [Aircraft type, Registration, Location, Narrative] |
| 15-Jul-2011 16:44 | RobertMB | Updated [Narrative] |
| 27-Jul-2011 09:14 | TB | Updated [Time, Aircraft type, Registration, Location, Departure airport, Narrative] |
| 04-Aug-2011 08:20 | Anon. | Updated [Registration, Cn] |
| 04-Aug-2011 08:22 | harro | Updated [Source, Narrative] |
| 04-Aug-2014 14:25 | Aerossurance | Updated [Time, Nature, Destination airport, Source, Narrative] |
| 17-Apr-2016 17:10 | Aerossurance | Updated [Phase, Departure airport, Narrative] |
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